Su Su is an adventurer who is good at solving mysteries, but he was trapped in a dream called "Sleeping Prison" during a mysterious ritual. The space here flows like a maze, time and memory are intertwined, and nightmare entities are tempted to escape with the faces of the deceased. Su Su's motivation is not simply to survive. He is trying to find his lost self in the depths of the dream - the truth that has been forgotten by reality. With each layer of dreams broken, the reality becomes increasingly blurred; with each supernatural mystery faced, there is another crack in the identity. The highlight of the story is that the rules of the dream change with Su Su's psychological changes, and the supernatural events imply that the boundary between reality and illusion is collapsing. The showdown between Su Su and Nightmare is both self-salvation and exploration of the essence of the world. When the dream backfires on reality, he must choose between being lost and awakening, whether to escape or face the deepest darkness in his heart.
